Currently, I am attempting to determine the height of a hidden TR element. Oddly enough, when using the jQuery height extension method, it keeps returning 0. When the TR is visible, the correct height is displayed. This issue contradicts my previous experience and knowledge, as I would expect the method to return the height regardless of visibility. Any assistance on this matter would be greatly appreciated!
Thank you in advance for your help!
Elements with a display:none attribute do not occupy any space in the document, hence they have zero dimensions.
Therefore, properties that rely on an element's size (like offsetWidth or offsetHeight) will typically return a value of 0.
Citation: CSS1 Formatting model
Note: Determining the dimensions of hidden elements can be challenging. If needed, you might find some useful insights in this related post.
Rotatin is correct. In the past, when I needed to determine the height of an element, I utilized jQuery to obtain the height, saved it in the element's data object, and then hid the element after the page loaded.
This approach may not be suitable for pages with numerous elements as it could appear slow due to all elements loading before being hidden.
If this technique is necessary, it can be implemented as follows:
$('.should_be_hidden').each(function() {
$(this).data('height',$(this).height()).hide();
});
This method is particularly handy if you plan to animate an object.
To retrieve the height when required, simply use:
var element_height = $('#some_element').data('height');
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